The Burmese–Siamese War ( 1785–1786 ) , known as the Nine Armies ' Wars in Siamese history because the Burmese came in nine armies , was fought Hostile_encounter between the Konbaung dynasty of Burma and the Chakri dynasty of resurgent Siam ( Thailand ) .

The invasion forces had faced Confronting_problem tough heavy resistance Defending from the Siamese forces and finally the war Military_operation become Becoming a total disaster Catastrophe of the Burmese armies .

Rammasun is a Siamese word for thunder god .